diff --git a/osm_nbi/html_public/version b/osm_nbi/html_public/version
index 1b5afc2..630b94d 100644
--- a/osm_nbi/html_public/version
+++ b/osm_nbi/html_public/version
@@ -1,2 +1,2 @@
-0.1.31
-2018-12-12
+0.1.32
+2018-12-21
diff --git a/osm_nbi/instance_topics.py b/osm_nbi/instance_topics.py
index ac0dba9..b9d929d 100644
--- a/osm_nbi/instance_topics.py
+++ b/osm_nbi/instance_topics.py
@@ -517,10 +517,10 @@
             }
             self.db.set_one("pdus", {"_id": pdu["_id"]},
                             {"_admin.usageState": "IN_USE",
-                             "_admin.usage.vnfr_id": vnfr["_id"],
-                             "_admin.usage.nsr_id": vnfr["nsr-id-ref"],
-                             "_admin.usage.vdur": vdur["vdu-id-ref"]}
-                            )
+                             "_admin.usage": {"vnfr_id": vnfr["_id"],
+                                              "nsr_id": vnfr["nsr-id-ref"],
+                                              "vdur": vdur["vdu-id-ref"]}
+                             })
             rollback.append({"topic": "pdus", "_id": pdu["_id"], "operation": "set", "content": rollback_pdu})
 
             # step 3. Fill vnfr info by filling vdur
@@ -668,7 +668,7 @@
             if not nsr["_admin"].get("nsState") or nsr["_admin"]["nsState"] == "NOT_INSTANTIATED":
                 if operation == "terminate" and indata.get("autoremove"):
                     # NSR must be deleted
-                    return self.delete(session, nsInstanceId)
+                    return None    # a none in this case is used to indicate not instantiated. It can be removed
                 if operation != "instantiate":
                     raise EngineException("ns_instance '{}' cannot be '{}' because it is not instantiated".format(
                         nsInstanceId, operation), HTTPStatus.CONFLICT)
@@ -1037,7 +1037,7 @@
             if not nsir["_admin"].get("nsiState") or nsir["_admin"]["nsiState"] == "NOT_INSTANTIATED":
                 if operation == "terminate" and indata.get("autoremove"):
                     # NSIR must be deleted
-                    return self.delete(session, nsiInstanceId)
+                    return None    # a none in this case is used to indicate not instantiated. It can be removed
                 if operation != "instantiate":
                     raise EngineException("netslice_instance '{}' cannot be '{}' because it is not instantiated".format(
                         nsiInstanceId, operation), HTTPStatus.CONFLICT)
diff --git a/osm_nbi/nbi.py b/osm_nbi/nbi.py
index 3dd3348..46c7c9b 100644
--- a/osm_nbi/nbi.py
+++ b/osm_nbi/nbi.py
@@ -815,6 +815,7 @@
                     outdata = self.engine.del_item_list(session, engine_topic, kwargs)
                     cherrypy.response.status = HTTPStatus.OK.value
                 else:  # len(args) > 1
+                    delete_in_process = False
                     if topic == "ns_instances_content" and not force:
                         nslcmop_desc = {
                             "lcmOperationType": "terminate",
@@ -822,8 +823,10 @@
                             "autoremove": True
                         }
                         opp_id = self.engine.new_item(rollback, session, "nslcmops", nslcmop_desc, None)
-                        outdata = {"_id": opp_id}
-                        cherrypy.response.status = HTTPStatus.ACCEPTED.value
+                        if opp_id:
+                            delete_in_process = True
+                            outdata = {"_id": opp_id}
+                            cherrypy.response.status = HTTPStatus.ACCEPTED.value
                     elif topic == "netslice_instances_content" and not force:
                         nsilcmop_desc = {
                             "lcmOperationType": "terminate",
@@ -831,9 +834,11 @@
                             "autoremove": True
                         }
                         opp_id = self.engine.new_item(rollback, session, "nsilcmops", nsilcmop_desc, None)
-                        outdata = {"_id": opp_id}
-                        cherrypy.response.status = HTTPStatus.ACCEPTED.value
-                    else:
+                        if opp_id:
+                            delete_in_process = True
+                            outdata = {"_id": opp_id}
+                            cherrypy.response.status = HTTPStatus.ACCEPTED.value
+                    if not delete_in_process:
                         self.engine.del_item(session, engine_topic, _id, force)
                         cherrypy.response.status = HTTPStatus.NO_CONTENT.value
                 if engine_topic in ("vim_accounts", "wim_accounts", "sdns"):
@@ -875,7 +880,8 @@
                         self.engine.db.set_one(rollback_item["topic"], {"_id": rollback_item["_id"]},
                                                rollback_item["content"], fail_on_empty=False)
                     else:
-                        self.engine.del_item(**rollback_item, session=session, force=True)
+                        self.engine.db.del_one(rollback_item["topic"], {"_id": rollback_item["_id"]},
+                                               fail_on_empty=False)
                 except Exception as e2:
                     rollback_error_text = "Rollback Exception {}: {}".format(rollback_item, e2)
                     cherrypy.log(rollback_error_text)